MANUFACTURING – PCB & ELECTRONIC MANUFACTURING CALCULATOR
Conformal Coating Coverage
A precise tool.
What is the Conformal Coating Coverage & How does it work?
Conformal coating protects printed circuit boards from moisture, dust, and chemical exposure. The amount of coating required depends primarily on the board’s exposed surface area and the desired film thickness, which together define the total volume of material that must be applied. The coating thickness is typically specified in micrometres (µm). Because the coating spreads uniformly over the board, the volume can be calculated by multiplying the board area (in cm²) by the thickness (converted to centimetres) and a unit‑conversion factor. This yields a volume in cubic centimetres, which is numerically equal to millilitres. In practice a waste factor is added to account for overspray, edge effects, and material that remains on the applicator. The final required volume is the base volume multiplied by (1 + waste %).
V = A times t times 10^{-4}
V = coating volume (mL), A = board area (cm²), t = coating thickness (µm)
Parameters
Result
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Frequently Asked Questions
How do I calculate the volume of conformal coating needed?
Multiply the board’s exposed surface area in cm² by the desired film thickness in micrometres, then convert to milliliters.
What is the purpose of conformal coating on PCBs?
Conformal coating protects printed circuit boards from moisture, dust, and chemical exposure.
Can you explain how to measure the surface area of a PCB?
Measure the length and width of each exposed section of the board in centimeters, then sum the areas.
What factors affect the choice of coating thickness?
Factors include environmental conditions, component sensitivity, and operational requirements.
How do I convert micrometres to milliliters for coating volume?
Multiply the area in cm² by the thickness in µm, then divide by 1,000,000 to get ml.
What are some common types of conformal coatings used?
Common types include acrylics, urethanes, epoxies, and silicone resins.
How often should conformal coating be reapplied?
Reapplication depends on usage conditions but is typically required every 3-5 years.
Results are for informational purposes only and do not constitute professional advice.